Theoretical Studies in Quantum Dynamics

Horia Metiu得到了理论和计算化学计划的资助，以继续他在量子动力学方面的研究。目前正在研究的三个领域是：1)波包干涉术作为研究高激发态的灵敏方法正在扩展到非线性光谱学；2)正在开发一种技术，用于计算嵌入在经典体系中的低量子度体系的光子吸收和拉曼散射截面，例如，分子筛中溶解的电子；以及3)正在发展一种含时理论，用于处理受限半导体结构中的激子形成和隧穿，例如量子井、线、点和团簇。有许多有趣的生化、化学和固态系统，其中一个电子与复杂的环境相互作用。电子的光谱将这种相互作用与可观察到的量联系起来，使我们有机会了解潜在的动力学机制。此外，人们正在广泛地研究受限半导体结构中的电子和空穴的性质，希望将它们应用于光电子和隧道器件中。Metiu将使用含时量子力学技术来研究这些系统中电子、空穴和激子的行为。这项工作将有助于为这些复杂系统的行为提供有用的直观模型。

Horia Metiu is supported by a grant from the Theoretical and Computational Chemistry Program to continue his research in quantum dynamics. Three areas of research are being studied: 1) wave packet interferometry is being extended to nonlinear spectroscopy as a sensitive method for studying highly excited states; 2) a technique is being developed for calculating photon absorption and Raman scattering cross sections for systems with few quantum degrees embedded in a bath of classical ones, e.g. an electron solvated in a zeolite; and 3) a time dependent theory is being developed for treating exciton formation and tunneling in confined semiconductor structures, e.g. quantum wells, wires, dots and clusters. There are many interesting biochemical, chemical and solid state systems in which an electron interacts with a complex environment. The spectroscopy of the electron connects this interaction to observable quantities and gives us a chance to understand the underlying dynamical mechanisms. Furthermore the properties of electrons and holes in confined semiconductor structures are being extensively studied in the hope of using them in opto-electronic and tunneling devices. Metiu will employ the techniques of time dependent quantum mechanics to study the behavior of electrons, holes and excitons in these systems. This work will help to provide useful intuitive models for the behavior of these complex systems.